export interface ArkmeMessagePreparingTarget {
    accountScope: string;
    sourceKey: string;
    sourceRef: string;
}
export interface ArkmeMessagePreparingTransport {
    report(target: ArkmeMessagePreparingTarget, prepareAtMillis: number): Promise<void>;
    cancel(target: ArkmeMessagePreparingTarget, cancelAtMillis: number): Promise<void>;
}
export declare class ArkmeMessagePreparingReporter {
    private readonly transport;
    private readonly now;
    private target;
    private reportedTarget;
    private desired;
    private revision;
    private sentRevision;
    private activityExpiresAt;
    private lastEventAt;
    private failures;
    private disabledUntil;
    private focused;
    private disposed;
    private inFlight;
    private armTimer;
    private emptyTimer;
    private idleTimer;
    private heartbeatTimer;
    constructor(transport: ArkmeMessagePreparingTransport, now?: () => number);
    setTarget(target: ArkmeMessagePreparingTarget | undefined): void;
    setFocused(focused: boolean): void;
    /** Only genuine composer edits call this; restoring a draft must not publish presence. */
    input(text: string): void;
    stop(): void;
    private clearActivity;
    dispose(): void;
    private timestamp;
    private requestReport;
    private flush;
}
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